CN103166325B - Energy storage system and the method controlling this energy storage system - Google Patents
Energy storage system and the method controlling this energy storage system Download PDFInfo
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- CN103166325B CN103166325B CN201210334882.6A CN201210334882A CN103166325B CN 103166325 B CN103166325 B CN 103166325B CN 201210334882 A CN201210334882 A CN 201210334882A CN 103166325 B CN103166325 B CN 103166325B
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- energy
- battery
- electrical network
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- storage system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a kind of energy storage system and a kind of method of this energy storage system of control, described energy storage system includes：Battery；Electric power regulating system, is attached to described battery；Switch, can be attached to internal load, described battery, electrical network or the external loading of described electric power regulating system；And controller, described controller receives the energy use cost information of described electrical network and the residual capacity information of described battery, according to described energy use cost information and described residual capacity information determine in described battery and the energy of described electrical network which by be provided described external loading and determine in described battery and the energy of described electrical network which will be provided to described internal load, and control described switch to provide described external loading by the energy of described battery or described electrical network and to provide described internal load by the energy of described battery or described electrical network according to described determination.
Description
This application claims No. 61/577,240 U.S. being submitted to U.S.Patent ＆ Trademark Office on December 19th, 2011 faces
When application and be submitted within 1st the excellent of No. 13/564,694 U.S.'s non-provisional application of U.S.Patent ＆ Trademark Office in August in 2012
First power and rights and interests, the disclosure of above-mentioned application is all incorporated herein by quoting.
Technical field
An aspect of of the present present invention is related to a kind of energy storage system, more particularly, be related to a kind of energy storage system and
A kind of method controlling this energy storage system.
Background technology
To for store energy and efficiently using storage energy system demand with such as environmental disruption, resource
The appearance of problem that exhausts etc. and increase.In addition, preventing the rechargeable energy (example of the pollution of generation in energy generation process
As solar energy, wind energy, tide energy etc.) relative importance constantly improve.
Energy storage system is for by electricity generation system (for example, rechargeable energy electricity generation system), for storing energy
Battery and the system of existing electrical network combination.
Additionally, energy storage system is used for combining electricity generation system and electrical network, to supply energy to load.
Energy storage system utilizes energy to driving electric regulating system, and this is referred to as the internal consumption energy of energy storage system
Amount.In the prior art, if electrical network is in normal condition, the energy of electrical network is used for providing internal consumption energy and is sent to negative
The energy carrying, if electrical network is in unsteady state, such as power-off, then because energy storage system executes uninterrupted power source
(UPS) operate, so energy storage system provides internal consumption energy using the battery supply providing at energy storage system
Amount and the energy being sent to load.
However, because the energy use cost (or expense) of electrical network changes (for example, changing) according to the time, if so
Electrical network is in normal condition, then the electric power that electrical network is used may not be efficient as internal consumption electric power (or load electric)
(for example, economically efficiently).
Content of the invention
The many aspects of the embodiment of the present invention provide a kind of energy storage system and a kind of this energy storage system of control
Method, selected by the residual capacity of the energy use cost (or expense) according to electrical network (or other energy source) and battery
The main body (for example, the energy) of energy is provided to provide more to the inside of energy storage system and load (for example, external loading)
Efficiently (for example, economically efficiently) energy make energy use cost minimize (or reduce).
In order to provide the many aspects of the embodiment of the present invention, described energy storage system includes：Battery；Electric adjustment system
System, is attached to described battery；Switch, be configured to be attached to the internal load of described electric power regulating system, described battery,
One or more of electrical network and external loading；And controller, it is configured to：Receive the energy use cost letter of described electrical network
Breath and the residual capacity information of described battery；According to the energy use cost information of described electrical network and the residual capacity of described battery
Information, determine in the energy of described battery and the energy of described electrical network which will be provided to described external loading, and really
Which in the energy of the energy of fixed described battery and described electrical network will be provided to described internal load；And according to described
Determine to control described switch, the energy of the energy of described battery or described electrical network is provided described external loading, and will
The energy of the energy of described battery or described electrical network provides described internal load.
In an embodiment, described switch can include：First switch, is configured to described external loading and described inside
At least one of load provides the energy of described battery；And second switch, it is configured to described external loading and described
At least one of internal load provides the energy of described electrical network.
Described first switch can include：The first terminal, is attached to described battery；Second terminal, is attached to described inside
Load；Third terminal, is attached to described external loading；And forth terminal, it is not bonded to described external loading and described inside
Any one of load, wherein, described first switch is configured to described first end according to the signal from described controller
Son is attached at least one of described Second terminal, described third terminal and described forth terminal.In one embodiment, institute
State the first terminal and described battery can be attached to by described electric power regulating system.
Described second switch can include：The first terminal, is attached to described electrical network；Second terminal, is attached to described inside
Load；Third terminal, is attached to described external loading；And forth terminal, it is not bonded to described external loading and described inside
Any one of load, wherein, described second switch is configured to described first end according to the signal from described controller
Son is attached at least one of described Second terminal, described third terminal and described forth terminal.
Described controller can include：Battery remaining power massaging device, is configured to receive the remaining appearance of described battery
Amount information；Power grid energy use cost massaging device, is configured to receive the energy use cost information of described electrical network；And open
Gateway controller, is configured to control described first to open according to the residual capacity information receiving and the energy use cost information of reception
Close and described second switch.In one embodiment, described battery remaining power massaging device can be configured to：Storage first
With reference to the value of capacity and the value of the second reference capacity；Residual capacity information according to the described battery receiving and described first reference
Capacity and described second with reference to capacity relatively to calculate capability value；And described capability value is transferred to described on-off control
Device.In one embodiment, described power grid energy use cost massaging device can be configured to：Storage first is with reference to expense
Value；Energy use cost information according to the described electrical network receiving relatively is made calculating energy with the described first reference cost value
Use value at cost；And described energy use cost value is transferred to described switch controller.
Described electric power regulating system can include：Energy conversion device, the energy being configured to produce electricity generation system turns
It is changed to DC link voltage；Inverter, be configured to by described DC link voltage inversion be described electrical network AC voltage or will be described
The AC voltage conversion of electrical network is DC link voltage；Transducer, is configured to be converted to described DC link voltage for for described
The cell voltage that battery charges, or described cell voltage is converted to DC link voltage；Battery management system, is attached to described electricity
Pond, described battery management system is configured to control the charging and discharging of described battery to operate；And electric adjustment controller, quilt
It is configured to monitor described electricity generation system, described electrical network, described battery and described internal load, and be configured to control described energy
Conversion equipment, described inverter, described transducer and described battery management system.
In order to provide the many aspects of the embodiment of the present invention, there is provided a kind of method of control energy storage system, described
Energy storage system includes electric power regulating system and battery, and methods described includes：Receive electrical network energy use cost information and
The residual capacity information of described battery；The residual capacity letter of the energy use cost information according to described electrical network and described battery
Breath, determine in the energy of described battery and the energy of described electrical network which will be provided to external loading, and determine described
Which in the energy of the energy of battery and described electrical network will be provided to the internal load of described energy storage system；And
At least one of energy by the energy of described electrical network and described battery provides described internal load and/or described outside to bear
Carry.
Methods described can also include：Store the reference cost relevant with electrical network electric cost value；Storage and described battery
Residual capacity relevant first with reference to capacity；Store the first reference capacity described in the ratio relevant with the residual capacity of described battery
High second is with reference to capacity；Execute operation, described operation includes at least one of following：The energy of described electrical network is used into
This information be compared with reference to cost, and by the residual capacity information of described battery and the described first reference capacity and described
Second is compared with reference at least one of capacity；And described internal load, described outside are controlled based on described operation
The combination of load and described battery and the combination of described internal load, described external loading and described electrical network.
In one embodiment, methods described can also include：When the energy use cost information of described electrical network is described
With reference to when below cost, the energy of described electrical network is provided described external loading and described internal load is provided.
In one embodiment, methods described can also include：When the energy use cost information of described electrical network is higher than institute
State with reference to cost, and the residual capacity information of described battery first with reference to capacity below when, the energy of described electrical network is carried
It is supplied to described external loading and described internal load is provided.
In one embodiment, methods described can also include：When the energy use cost information of described electrical network is higher than institute
State with reference to cost, and the residual capacity information of described battery is higher than first with reference to capacity and below the described second reference capacity
When, the energy of described electrical network is provided described external loading, and the energy of described battery is provided described internal load.
In one embodiment, methods described can also include：When the energy use cost information of described electrical network is higher than institute
State with reference to cost, and when the residual capacity information of described battery is higher than the second reference capacity, the energy of described battery is provided
To described external loading and provide described internal load.
Brief description
Figure 1A is the block diagram of the construction illustrating energy storage system according to embodiments of the present invention.
Figure 1B is the block diagram of the construction illustrating energy storage system according to another embodiment of the present invention.
Fig. 2 is the schematic block diagram of the construction being shown in the second controller shown in Figure 1A and Figure 1B.
Fig. 3 is the flow chart illustrating the method for control energy storage system according to embodiments of the present invention.
Specific embodiment
In the following detailed description, only only illustrate and describe the particular implementation of the present invention by way of illustration
Example.It would be recognized by those skilled in the art that the present invention can be embodied in many different forms, and it is not construed as limiting to
In the embodiment herein proposing.Additionally, in the context of this application, when element is referred to as " being attached to " another element, should
Element directly " can be attached to " another element, or indirect " being attached to " another element, and has inserted one between them
Or multiple intermediary element.
Describe embodiments of the invention with reference to the accompanying drawings in detail.
Figure 1A is the block diagram of the construction illustrating energy storage system according to embodiments of the present invention, and Figure 1B is to illustrate according to this
Invent the block diagram of the construction of the energy storage system of another embodiment, Fig. 2 is to be shown in the second control shown in Figure 1A and Figure 1B
The schematic block diagram of the construction of device processed.
With reference to Figure 1A, energy storage system 1 according to embodiments of the present invention can arrive in conjunction with (for example, connect or be electrically coupled)
Electricity generation system 2 (for example, rechargeable energy electricity generation system), electrical network 3 (for example, public utility) or both, thus electric power is supplied
It is given to load 4 (for example, external loading).Energy storage system can include electric power regulating system (PCS) 100 and battery 40.PCS
100 can include energy (or electric power) converter section 10, DC link portion 20, inverter 30 (for example, two-way inverter), battery management
System (BMS) (41), transducer 50 (for example, bidirectional transducer) and the first controller 80.In addition, it is according to embodiments of the present invention
Energy storage system 1 selects to provide load 4 Hes by the residual capacity of the energy use cost based on electrical network 3 and/or battery
The energy of internal load X and provide more efficient (for example, cost-efficient or economic) energy consumption so that energy use
Cost (or expense) minimizes or reduces.The electric power that internal load X is consumed can be that the internal energy of energy storage system 1 disappears
Consumption (for example, the operation power of the element of PCS 100).
Embodiments of the invention can also include energy use cost (or expense) information and battery for receiving electrical network 3
The second controller 90 of 40 residual capacity information.In addition, embodiments of the invention can include first switch (SW1) and second
Switch (SW2), can be according to control signal operation first switch (SW1) providing from second controller 90 and second switch
(SW2), to provide the electric power of electrical network 3 or battery 40 to external loading 4 or internal load X.
In an embodiment of the present invention, electricity generation system 2 is for producing electric power using the energy (for example, regenerative resource)
System.The power supply that electricity generation system 2 can be produced is to energy storage system 1.Electricity generation system 2 can be solar energy system
Other that system, wind power generation system, tidal energy system or the regenerative resource using solar energy, underground heat etc. produce electric power can
Regeneration energy generating system.
For example, be may be mounted in house or factory it is possible to be suitable for using the solaode that sunlight produces electric energy
The energy storage system 1 that Yu Yuke is distributed at each family is used together.Electricity generation system 2 can provide multiple moulds of parallel connection
Block, produces electric power hence for each module.
Electrical network 3 can include power plant, transformer station and transmission line.If electrical network 3 is in normal condition, electrical network 3 can be by
Power supply to energy storage system 1 or load 4 it is possible to receive from energy storage system 1 supply electric power (for example, by send out
Electric power that electric system 2 produces or storage in battery 40).If electrical network 3 is in abnormality, electric power can be no longer from electrical network
3 flow to energy storage system 1 or flow to electrical network 3 from energy storage system 1.
In an embodiment of the present invention, load 4 refers to consume the electric power being produced by electricity generation system 2, is stored in battery 40
Electric power or from electrical network 3 supply electric power device.Load 4 can be family, factory etc..
The electric power that electricity generation system 2 can be produced by energy storage system 1 is stored in battery 40 electricity it is possible to will produce
Power is sent to electrical network 3.In addition, the electric power of storage in battery 40 can be sent to electrical network 3 by energy storage system 1, or will be from electricity
The electric power of net 3 supply is stored in battery 40.In addition, if energy storage system 1 is in abnormality, for example, electric when occurring
During the power-off of net 3, then energy storage system 1 can execute uninterrupted power source (UPS) operation, thus feeding electrical power to load 4.
For example, energy storage system 1 by electric power that electricity generation system 2 produces or can be stored in power supply in battery 40 to load 4.
In an embodiment of the present invention, energy storage system 1 includes electric power regulating system (PCS) 100 and battery 40.PCS
100 can include energy convertion section 10, DC link portion 20, inverter 30, battery management system (BMS) 41, transducer 50, electrical network
Connector 60 and the first controller 80.Inverter 30 and transducer 50 can be implemented as two-way inverter 30 and bidirectional transducer
50, the embodiment including two-way inverter 30 and bidirectional transducer 50 shown in Figure 1A and Figure 1B will be shown as non-limiting
Example is describing.
Energy convertion section 10 can be in conjunction between electricity generation system 2 and primary nodal point (N1), thus will produce from electricity generation system 2
Raw electrical power conversion is the DC electric power at primary nodal point (N1) place.The operation of energy convertion section 10 can be based on and produce from electricity generation system 2
Raw electric power and change.For example, when electricity generation system 2 produces AC electric power, AC electrical power conversion is first segment by energy convertion section 10
The DC electric power of point (N1).In addition, when producing DC electric power from electricity generation system 2, the voltage of DC electric power is raised and lowered and (for example, subtracts
Pressure) to primary nodal point (N1) DC electric power voltage.
For example, if electricity generation system 2 is solar power system, energy convertion section 10 can be that basis is drawn by solar heat
The temperature change rising or solar radiation variations detect maximum power point and produce the MPPT maximum power point tracking transducer of electric power
(MPPT).However, energy convertion section 10 not limited to this are it is possible to include for example various types of transducers and/or commutator.
DC link portion 20 can be in conjunction with inverter (for example, two-way inverter) 30 and transducer (for example, bi-directional conversion
Device) between, to keep DC link electric power (Vlink) constant (or substantial constant) of primary nodal point (N1).
The voltage level at primary nodal point (N1) place is due to the instantaneous pressure drop of electricity generation system 2 or electrical network 3 or due in load 4
Peak load consumption and can become unstable.However, it is possible to beneficial, primary nodal point (N1) voltages keep constant (or base
Constant in basis) voltage level, thus being appropriately performed inverter (for example, two-way inverter) 30 and transducer is (for example, two-way
Transducer) 50 stable operation.For this reason, DC link portion 20 can include capacitor (or multiple capacitor), such as aluminium electroloysis electricity
Container, high-pressure membrane polymer capacitors or the multilayer ceramic capacitor (MLSS) for high voltage and high current.
Battery 40 can be supplied to and can store from the electric power of electricity generation system 2 generation or the electric power of electrical network 3 it is possible to incite somebody to action
The power supply of storage is to load 4, internal load X or electrical network 3.Battery 40 can include at least one battery unit, each electricity
Pool unit can include multiple plain batteries.Battery 40 can include various types of battery units, such as nickel-cadmium cell, lead electricity
Pond, nickel metal hydride battery (NiMH), lithium ion battery, lithium polymer battery etc..Such as energy storage system 1 can be based on
Required power capacity or design condition are determining the quantity of the battery unit of (or offer) battery 40.It is further illustrated,
Multiple battery units of battery 40, if energy consumption is relatively large, can be provided, if energy consumption is relatively small, battery 40 can be provided
Only one battery unit.
In an embodiment of the present invention, BMS 41 is attached to battery 40, to control charging and discharging to operate.Can be by the
One controller (for example, integrated manipulator) 80 is controlling BMS 41.BMS (41) can execute overcharge protection, overdischarge
Defencive function, excess current protective function, over-voltage protection function, overheat protective function, battery balanced function etc..For this reason, BMS
41 voltages that can monitor battery 40, electric current, temperature, dump energy, life-span, state-of-charge etc. are it is possible to by related information
It is sent to the first controller 80.In an embodiment of the present invention, BMS 41 and battery 40 separate, but can include being integrated with
BMS 41 and the set of cells of battery 40.
In an embodiment of the present invention, transducer (for example, bidirectional transducer) 50 will be defeated from battery 40 in the way of DC-DC
The voltage conversion of the electric power going out is DC voltage level, i.e. DC link voltage (Vlink).In addition, transducer (for example, bi-directional conversion
Device) 50 voltage levels that the charging power flowing through primary nodal point (N1) can be converted to battery 40 in the way of DC-DC.Charge
Electric power can be the electric power for example producing from electricity generation system 2 or be supplied from electrical network 3 by inverter (for example, two-way inverter) 30
Electric power.
In an embodiment of the present invention, inverter (for example, two-way inverter) 30 is to provide for secondary nodal point (N2) and
Electric transducer between one node (N1), and it is attached to load 4 or electrical network connector 60.Inverter (for example, two-way inverter)
The 30 AC voltages that the DC link voltage (Vlink) exporting from electricity generation system 2 or battery 40 can be converted to electrical network 3.In addition, it is inverse
Become device (for example, two-way inverter) 30 and can carry out rectification to AC voltage it is possible to be DC link by the AC voltage conversion of rectification
Voltage (Vlink).Inverter (for example, two-way inverter) 30 may include for from output from the AC voltage harmonic carcellation of electrical network 3
Wave filter it is possible to include for will be from phase place and the electrical network 3 of the AC voltage of inverter (for example, two-way inverter) 30 output
Phase synchronization (or reduction) reactive power suppressing of AC voltage phaselocked loop.
In addition, inverter (for example, two-way inverter) 30 can execute such as scope range of the fluctuation of voltage restriction, power factor school
Just, the function of the elimination of DC component, transient phenomenon protection etc..
In an embodiment of the present invention, electrical network connector 60 combines in electrical network 3 and inverter (for example, two-way inverter) 30
Between.When there is abnormality at electrical network 3, electrical network connector 60 stops (for example, disconnected under the control of the first controller 80
Open or interrupt) connection of energy storage system 1 and electrical network 3.
Electrical network connector 60 can include such as switch element, junction transistor (BJT) or field-effect transistor (FET).
Although not shown in figure, can be in inverter (for example, two-way inverter) 30 and load 4 in PCS 100
Between include another connector.This other connector can be with series combination to electrical network connector 60 it is possible to control first
Stop under the control of device 80 processed in electric power flow direction load 4.This other connector can include such as switch element, junction type crystal
Pipe (BJT), field-effect transistor (FET) etc..
In an embodiment of the present invention, the first controller 80 monitors electricity generation system 2, the shape of electrical network 3, battery 40 and load 4
State, and energy convertion section 10, inverter (for example, two-way inverter) 30, BMS 41, transducer (example are controlled based on monitoring result
As bidirectional transducer) 50 and electrical network connector 60.
In an embodiment of the present invention, energy storage system 1 is driven using electric power including in its internal electric adjustment
System, this is referred to as the internal consumption electric power of energy storage system 1, i.e. the electric power that internal load X consumes.
For example, electric power can be used for driving energy converter section 10, inverter (for example, two-way inverter) 30, transducer (example
As bidirectional transducer) 50, electrical network connector 60, BMS 41, the first controller 80 etc..
In the prior art, if electrical network 3 is in normal condition, (for example, inside disappears the electric power that internal load X consumes
Power consumption power) by electrical network 3 power supply, if electrical network 3 is in abnormality, such as power-off, then because energy storage system hold
Row uninterrupted power source operates, so the electric power that internal load X consumes is supplied by the battery 40 providing in energy storage system 1.
However, because the electricity usage cost (or expense) of electrical network 3 can change (for example, differently can be applied), institute according to the time
As internal consumption electric power (for example, for supplying the electric power of internal load X) and not always rational using electric power that electrical network 3 is used
(for example, economical).
Therefore, the many aspects of the embodiment of the present invention are by the energy use cost (or expense) based on electrical network 3 and battery
40 residual capacity, selects offer to be applied to the master of the electric power of electric power regulating system 100 (for example, internal load X) or load 4
Body (for example, power supply), and provide the more efficient power consumption of (for example, economically efficiently) and make electric cost (or
Expense) minimize or reduce.
Embodiments of the invention can also be included for receiving the energy cost of use information of electrical network 3 and the residue of battery 40
The second controller 90 of capacity information, and also first switch (SW1) and second switch (SW2), first switch can be included
(SW1) operated according to the control signal providing from second controller 90 with second switch (SW2), so that battery 40 or electrical network 3
Electric power provide internal load X and/or load 4.
For example, battery 40 can be attached to the internal load X of electric power regulating system (PCS) 100 by first switch (SW1)
And/or load 4, thus the electric power of battery 40 is applied to internal load X and/or load 4.
First switch (SW1) can be incorporated in (or can be attached to) A terminal, B terminal and floating C terminal at least
One, wherein, A terminal is attached to the internal load X of electric power regulating system (PCS) 100, and (for example, outward B terminal is attached to load 4
Section load), floating C terminal had both been not bonded to the internal load X of electric power regulating system 100, was also not bonded to load 4.
In an embodiment of the present invention, when first switch SW1 is attached to A terminal, the electric power of battery 40 is applied to electric power
The internal load X of regulating system 100, when first switch SW1 is attached to B terminal, the electric power of battery 40 is applied to load 4, when
When first switch is only joined to C terminal, the electric power of battery 40 had both been not applied to electric power regulating system 100, was also not applied to load
4, i.e. it is in floating state.
In addition, arriving A terminal and B terminal when first switch SW1 combines (for example, in combination with or same time combination)
When, the electric power of battery 40 can be applied to internal load X and the load 4 of electric power regulating system 100.
In addition, second switch (SW2) can by electrical network 3 be attached to electric power regulating system (PCS) 100 internal load X and/
Or load 4 (for example, external loadings), thus the electric power of electrical network 3 is applied to internal load X and/or load 4.
For example, second switch (SW2) can be incorporated at least one of A terminal, B terminal and floating C terminal, its
In, A terminal is attached to the internal load X of electric power regulating system (PCS) 100, and B terminal is attached to load 4, and floating C terminal was both
It is not bonded to the internal load X of electric power regulating system 100, be also not bonded to load 4.
In an embodiment of the present invention, when second switch SW2 is attached to A terminal, the electric power of electrical network 3 is applied to electric power and adjusts
The internal load X of section system 100, when second switch SW2 is attached to B terminal, the electric power of electrical network 3 is applied to load 4, when second
When switch SW2 is only joined to C terminal, the electric power of electrical network 3 had both been not bonded to the internal load X of electric power regulating system 100, did not also tie
Close load 4.
In addition, arriving A terminal and B terminal when second switch SW2 combines (for example, in combination with or same time combination)
When, the electric power of electrical network 3 is applied to internal load X and the load 4 of electric power regulating system 100.
Referring now to Figure 1B, Figure 1B is the frame of the construction illustrating energy storage system according to another embodiment of the present invention
Figure.Because the energy storage system according to present example can include (or base identical with the element previously combining Figure 1A description
Identical in basis) element, so provide the description of the particular aspects of present example by referring to above description, and here will
It is not described in detail.
In addition to regard to the combination between first switch SW1 and battery 40, the energy storage system of Figure 1B is with Figure 1A's
Energy storage system is similar to.For example, it is shown as in figure ia for the energy of battery 40 being applied directly to A terminal, B end in SW1
In the case of son and/or C terminal, SW1 is shown as passing through electric power regulating system (PCS) 100 by battery in fig. ib
Energy adjustment (for example, being converted to AC voltage) after again the energy of battery is applied to A terminal, B terminal and/or C terminal.
The secondary nodal point (N2) of electric power regulating system 100 can be attached to electric power regulating system by first switch (SW1)
(PCS) 100 internal load X and/or be attached to load 4, thus the electric power at secondary nodal point (N2) place is applied to internal load X
And/or load 4.The electric power at secondary nodal point (N2) place can be battery 40 have been converted into DC link voltage (Vlink) and with
Inversion is the electric power of AC voltage afterwards.In addition, the electric power at secondary nodal point (N2) place not only can be the electric power of battery 40, but also can
To be the electric power of electricity generation system 2.
First switch (SW1) can be incorporated in (or can be attached to) A terminal, B terminal and floating C terminal at least
One, wherein, A terminal is attached to the internal load X of electric power regulating system (PCS) 100, and (for example, outward B terminal is attached to load 4
Section load), floating C terminal had both been not bonded to the internal load X of electric power regulating system 100, was also not bonded to load 4.
In an embodiment of the present invention, when first switch SW1 is attached to A terminal, the electric power of battery 40 is applied to electric power
The internal load X of regulating system 100, when first switch SW1 is attached to B terminal, the electric power of battery 40 is applied to load 4, when
When one switch is only joined to C terminal, the electric power of battery 40 had both been not applied to the internal load X of electric power regulating system 100, did not also apply
It is added to load 4, i.e. it is in floating state.
In addition, arriving A terminal and B terminal when first switch SW1 combines (for example, in combination with or same time combination)
When, the electric power of battery 40 can be applied to internal load X and the load 4 of electric power regulating system 100.
First switch (SW1) and second switch (SW2) can be designed to provide hardware construction, such as in Figure 1A or Figure 1B
The embodiment illustrating, but not limited to this, for those skilled in the art's meeting it is evident that still with the disclosure and claim
Spirit and scope consistent in the case of it is provided that other hardware or logical implementations.
Referring now to Fig. 2, in one embodiment of the invention, second controller 90 includes：Battery remaining power information
Acceptance division 92, for receiving the residual capacity information of battery 40；Electrical network electric cost (or expense) information acceptance division 94, is used for connecing
Receive electricity usage cost (or expense) information of electrical network 3；Switching controlling part 96, for control the operation of first switch (SW1) with
The combination controlling the internal load X, load 4 and battery 40 of electric power regulating system 100 is (for example, via PCS 100 and battery 40
In conjunction with), and it is used for internal load X, load 4 and the electricity controlling the operation of second switch (SW2) to control electric power regulating system 100
The combination of net 3.
In an embodiment of the present invention, first connect in battery remaining power information with reference to capacity storage with reference to capacity and second
In receipts portion 92, as the reference of the residual capacity for determining (or analysis) battery.
First can be determined by the selection of user with reference to capacity with reference to capacity and second (or the condition according to system and
Fixed), for example, it is possible to the first reference capacity is set to the 30% of the maximum capacity of battery 40 it is possible to set the second reference capacity
For the maximum capacity of battery 40 70%.
Battery remaining power information acceptance division 92 can (it can be supervised by BMS 41 by the residual capacity information of battery 40
Survey, calculate and/or transmit) it is compared it is possible to by by comparing calculating with first with reference to capacity and the second reference capacity
Switching controlling part 96 is arrived in value transmission (or reception and registration).
First can be stored in electrical network electric cost information acceptance division 94 with reference to cost (or expense) value, as really
The reference of the electricity usage cost (or expense) of fixed (or analysis) electrical network 3.
With reference to expense can be set to multiple, but for the ease of description, embodiments of the present invention have been described as being have for
One example with reference to the storage information of cost.
Use cost (or expense) letter of the electric power providing from electrical network 3 can be provided in real time by intelligent meter (not shown)
Breath.For example, electrical network electric cost (or expense) information acceptance division 94 can be by being embedded into energy storage system by intelligent meter
In the inside (for example, the second controller 90 of ESS 1) of system (ESS) 1 or by being connected to come receive information with intelligent meter.
The value of the first reference cost can be determined by the selection of user (or depending on according to condition of system).
The cost information of the electrical network receiving 3 can be entered with reference to cost by electrical network electric cost information acceptance division 94 with first
Row is compared it is possible to arrive switching controlling part 96 by being applied (transmission or reception and registration) by the value comparing calculating.
Although Figure 1A and Figure 1B shows second separating with the first controller 80 including in electric power regulating system 100
The construction of controller 90, but the first controller 80 and second controller 90 can be integrated in an integrated circuit (IC).
Therefore, the many aspects of the embodiment of the present invention are passed through according to second controller 90 and first switch and second switch
The electric power of battery 40 or electrical network 3 is optionally provided the internal load X of electric power regulating system 100 and/or bears by (SW1, SW2)
Carry 4 and provide efficient (for example, economically efficiently) electric consumption and make cost minimization or reduction.
The method that control energy storage system according to embodiments of the present invention will be described with reference to Fig. 3.
Fig. 3 is the flow chart illustrating the method for control energy storage system according to embodiments of the present invention.
After starting the operation of energy storage system, the residual capacity information of battery and the energy of electrical network 3 can be received
Use cost information (for example, battery remaining power information acceptance division 92 and the electrical network by being arranged in second controller 90
Electricity cost information acceptance division 94 receives) (S100).
It is then possible to by energy use cost (or expense) information of the residual capacity information of battery 40 and electrical network 3 with
First is compared (S110) with reference to capacity and first with reference to cost (or expense) with reference to capacity and second.
It is then possible to control the combination of the internal load X of electric power regulating system 100, load 4 and battery 40 according to comparing
(or the combination via PCS 100 and battery 40), and the knot of the internal load X, load 4 and electrical network 3 of electric power regulating system 100
Close (S120).
It is then possible to the electric power of the electric power of electrical network 3 or battery 40 is selectively supplied to by electricity according to the combination controlling
The internal load X of draught control system 100, and be selectively supplied to load 4 (for example, external loading) (S130).
For example, second controller 90 can by the energy use cost of the residual capacity information of battery 40 and electrical network 3 (or
Expense) information with first with reference to capacity and second with reference to capacity and first with reference to cost (or expense) be compared (S110).
Then, second controller 90 can control the internal load X to electric power regulating system 100, load 4 and the combination of battery 40 (or
Combination via PCS 100 and battery 40) operation of first switch SW1 that is controlled is it is possible to control to electric adjustment system
The operation (S120) of the second switch SW2 that the combination of the internal load X of system 100, load 4 and electrical network 3 is controlled.In addition, the
Two controllers 90 can optionally execute (for example, in conjunction with) main body (for example, electrical network 3 or battery 40), and this main body provides and applied
It is added to the internal load X of electric power regulating system 100 and/or the electric power (S130) of load 4.
In an embodiment of the present invention, if the energy use cost (or expense) of electrical network 3 is below the first reference expense
(S112), then the first switch (SW1) being attached to battery 40 (for example, being attached to battery 40 via PCS 100) is controlled to be attached to C
Terminal (that is, is in floating state), and controls the second switch (SW2) being attached to electrical network 3 to be attached to A terminal and B terminal
(S122).That is, the electric power of electrical network 3 is provided the internal load X and load 4 (S132) of electric power regulating system 100.
I.e., in this embodiment, if energy use cost (or expense) first with reference to cost (or expense) below,
Controller is determined：The electric power that electrical network 3 is used is ratio as the consumption electric power of load 4 and the internal power of energy storage system 1
Relatively inexpensive.
In an embodiment of the present invention, if the energy use cost (or expense) of electrical network 3 is higher than the first reference expense,
Select to provide the electricity of the internal load X of electric power regulating system 100 and load 4 by the other residual capacity considering battery 40
Source.
For example, if the energy use cost (or expense) of electrical network 3 is higher than the first reference expense, and the residue of battery 40
Capacity below the first reference capacity (S114), then controls and is attached to battery 40 (for example, being attached to battery 40 via PCS 100)
First switch SW1 be attached to C terminal (floating state), and control second switch SW2 to be attached to A terminal and B terminal (S124).
That is, the electric power of electrical network 3 is provided the internal load X and load 4 (S134) of electric power regulating system 100.
That is, even if the energy use cost (or expense) of electrical network 3 is higher than the first reference expense, if the remaining appearance of battery 40
First with reference to capacity (for example, 30%) below, then controller still selects the consumption electric power as load 4 for the electric power of electrical network 3 to amount
Internal power with energy storage system 1.
For another example, if the energy use cost (or expense) of electrical network 3 is higher than first with reference to expense, the remaining appearance of battery 40
Amount is higher than the first reference capacity, and the residual capacity of battery 40 below the second reference capacity (S116), then controls and is attached to
First switch SW1 of battery 40 (for example, being attached to battery 40 via PCS 100) is attached to A terminal, and controls and be attached to electrical network
3 second switch SW2 is attached to B terminal (S126).That is, the electric power of battery 40 is provided the inside of electric power regulating system 100
Load X, and the electric power of electrical network 3 is provided load 4 (S136).
That is, if the residual capacity of battery 40 in suitable scope (for example, 30% to 70%), then can use by battery 40
Make the internal consumption electric power of energy storage system 1, and the electric power of electrical network 3 can serve as loading 4 consumption.
As last example, if the energy use cost (or expense) of electrical network 3 is higher than the first reference expense, and
The residual capacity of battery 40 is higher than the second reference capacity (S118), then control the second switch SW2 being attached to electrical network 3 to be attached to C
Terminal (is in floating state), and controls the first switch being attached to battery 40 (for example, being attached to battery 40 via PCS 100)
SW1 is attached to A terminal and B terminal (S128).That is, the electric power of battery 40 is provided the internal load X of electric power regulating system 100
With load 4 (S138).
That is, if the residual capacity of battery 40 is higher than the second reference capacity (such as, 70%), then controller can determine that
The capacity of battery 40 is higher, and the electric power of battery 40 can be used to disappear as the consumption of load 4 and the inside of energy storage system 1
Consumption.
The many aspects of embodiments of the invention provide energy storage system and control method, this energy storage system and
Control method is selected to load and electric power storage by the residual capacity of the electricity usage expense according to electrical network and/or battery 40
The inside of system provides the main body of electric power, to provide efficient power consumption and electricity usage expense that minimize or reduction.
It would be recognized by those skilled in the art that described embodiment can be changed in a variety of ways, and these
Modification is all without departing from as the spirit or scope of the present invention disclosed in description or claims and its equivalent.
Claims (14)
1. a kind of energy storage system, described energy storage system includes：
Battery；
Electric power regulating system, is attached to described battery；
Switch, is configured to be attached to internal load, described battery, electrical network and the external loading of described electric power regulating system
One or more of；And
Controller, is configured to：Receive the energy use cost information of described electrical network and the residual capacity information of described battery；Root
According to the energy use cost information of described electrical network and the residual capacity information of described battery, determine the energy of described battery and described
Which in the energy of electrical network will be provided to described external loading, and determine the energy of described battery and the energy of described electrical network
Which in amount will be provided to described internal load；And described switch is controlled according to described determination, by described electricity
The energy of the energy in pond or described electrical network provides described external loading, and the energy by the energy of described battery or described electrical network
Described internal load is provided,
Wherein, described controller be configured to control described switch so that：When described energy use cost information corresponds to ratio the
One is higher than first with reference to capacity and in the second ginseng with reference to the high cost of energy of cost value, simultaneously the residual capacity information of described battery
When examining below capacity, the energy of described battery is provided described internal load, provide institute by the energy of described electrical network simultaneously
State external loading.
2. energy storage system according to claim 1, wherein, described switch includes：
First switch, is configured to provide the energy of described battery at least one of described external loading and described internal load
Amount；And
Second switch, is configured to provide the energy of described electrical network at least one of described external loading and described internal load
Amount.
3. energy storage system according to claim 2, wherein, described first switch includes：
The first terminal, is attached to described battery；
Second terminal, is attached to described internal load；
Third terminal, is attached to described external loading；And
Forth terminal, is not bonded to any one of described external loading and described internal load, wherein,
Described first switch is configured to, according to the signal from described controller, described the first terminal is attached to described second
At least one of terminal, described third terminal and described forth terminal.
4. energy storage system according to claim 3, wherein, described the first terminal is tied by described electric power regulating system
Close described battery.
5. energy storage system according to claim 2, wherein, described second switch includes：
The first terminal, is attached to described electrical network；
Second terminal, is attached to described internal load；
Third terminal, is attached to described external loading；And
Forth terminal, is not bonded to any one of described external loading and described internal load, and
Described second switch is configured to, according to the signal from described controller, described the first terminal is attached to described second
At least one of terminal, described third terminal and described forth terminal.
6. energy storage system according to claim 2, wherein, described controller includes：
Battery remaining power massaging device, is configured to receive the residual capacity information of described battery；
Power grid energy use cost massaging device, is configured to receive the energy use cost information of described electrical network；And
Switch controller, is configured to according to the residual capacity information receiving and the energy use cost information of reception control
First switch and described second switch.
7. energy storage system according to claim 6, wherein, described battery remaining power massaging device is configured to：
The value of storage the first reference capacity and the value of the second reference capacity；
According to receive described battery residual capacity information with described first with reference to capacity and described second with reference to capacity ratio
Relatively to calculate capability value；And
Described capability value is transferred to described switch controller.
8. energy storage system according to claim 6, wherein, described power grid energy use cost massaging device is configured
For：
Storage first is with reference to cost value；
Energy use cost information according to the described electrical network receiving with described first with reference to cost value relatively calculating energy
Use cost value；And
Described energy use cost value is transferred to described switch controller.
9. energy storage system according to claim 1, wherein, described electric power regulating system includes：
Energy conversion device, the energy being configured to produce electricity generation system is converted to DC link voltage；
Inverter, be configured to by described DC link voltage inversion be described electrical network AC voltage or the AC voltage by described electrical network
Be converted to described DC link voltage；
Transducer, is configured to for described DC link voltage to be converted to cell voltage for charging for described battery, or by institute
State cell voltage and be converted to described DC link voltage；
Battery management system, is attached to described battery, described battery management system be configured to control described battery charging and
Discharge operation；And
Electric adjustment controller, is configured to monitor described electricity generation system, described electrical network, described battery and described internal load,
And be configured to control described energy conversion device, described inverter, described transducer and described battery management system.
10. a kind of method controlling energy storage system, described energy storage system includes electric power regulating system and battery, described
Method includes：
Receive the energy use cost information of electrical network and the residual capacity information of described battery；
According to the energy use cost information of described electrical network and the residual capacity information of described battery, determine the energy of described battery
Which in the energy of described electrical network external loading be will be provided to, and the energy of described battery and described electrical network determined
Which in energy will be provided to the internal load of described energy storage system；And
At least one of energy by the energy of described electrical network and described battery provides described internal load and/or described outer
Section load,
Wherein, when described energy use cost information corresponds to the cost of energy with reference to high cost for the ratio, described battery is surplus simultaneously
Remaining capacity information be higher than first with reference to capacity and second with reference to when below capacity, the energy of described battery is provided described interior
The energy of described electrical network is provided described external loading by section load simultaneously.
11. methods according to claim 10, methods described also includes：
Store the reference cost relevant with electrical network electric cost value；
Store first relevant with the residual capacity of described battery with reference to capacity；
Store the second high reference capacity of the first reference capacity described in the ratio relevant with the residual capacity of described battery；
Execute operation, described operation includes at least one of following：By the energy use cost information of described electrical network with described
It is compared with reference to cost；And by the residual capacity information of described battery and described first with reference to capacity and described second reference
At least one of capacity is compared；And
Described internal load, described external loading is controlled to bear with the combination of described battery and described inside based on described operation
The combination of load, described external loading and described electrical network.
12. methods according to claim 11, methods described also includes：
When the energy use cost information of described electrical network is below described reference cost, the energy of described electrical network is provided institute
State external loading and described internal load is provided.
13. methods according to claim 11, methods described also includes：
When the energy use cost information of described electrical network is higher than described reference cost, and the residual capacity information of described battery exists
First, with reference to when below capacity, the energy of described electrical network is provided described external loading and provides described internal load.
14. methods according to claim 11, methods described also includes：
When the energy use cost information of described electrical network is higher than described reference cost, and the residual capacity information of described battery is high
When the second reference capacity, the energy of described battery is provided described external loading and described internal load is provided.
Applications Claiming Priority (4)
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| US201161577240P | 2011-12-19 | 2011-12-19 | |
| US61/577,240 | 2011-12-19 | ||
| US13/564,694 US9293923B2 (en) | 2011-12-19 | 2012-08-01 | Energy storage system and controlling method of the same |
| US13/564,694 | 2012-08-01 |
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| CN103166325A CN103166325A (en) | 2013-06-19 |
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| DE102012212654A1 (en) | 2012-07-19 | 2014-01-23 | Robert Bosch Gmbh | Energy storage for Photovoltaikanalage, energy storage power plant, control device and method for operating an energy storage |
| DE102015011230A1 (en) * | 2015-08-25 | 2017-03-02 | Audi Ag | Energy storage device for an electrical alternating voltage network |
| JP6593755B2 (en) * | 2015-10-30 | 2019-10-23 | パナソニックＩｐマネジメント株式会社 | Power storage system |
| NO20160593A1 (en) * | 2016-04-12 | 2017-10-13 | Pexip AS | Improvements in multimedia conferencing |
| CN109075604B (en) * | 2016-04-15 | 2021-12-07 | 东芝三菱电机产业系统株式会社 | Uninterruptible power supply device |
| JP2017195739A (en) * | 2016-04-22 | 2017-10-26 | 株式会社東芝 | Power supply device, power supply system, and micro grid |
| KR102183464B1 (en) * | 2016-06-30 | 2020-11-26 | 현대일렉트릭앤에너지시스템(주) | Energy storage system |
| KR20180136177A (en) * | 2017-06-14 | 2018-12-24 | 엘에스산전 주식회사 | An energy storage system |
| KR102389302B1 (en) * | 2017-11-28 | 2022-04-20 | 엘에스일렉트릭(주) | An energy storage system |
| CN111406352B (en) * | 2017-11-28 | 2023-11-10 | Ls电气株式会社 | energy storage system |
| KR102323938B1 (en) * | 2017-11-28 | 2021-11-08 | 엘에스일렉트릭(주) | An energy storage system |
| US10651648B2 (en) | 2018-01-11 | 2020-05-12 | General Electric Company | System for powering auxiliary loads of an energy storage system |
| WO2019145997A1 (en) * | 2018-01-23 | 2019-08-01 | Tdk株式会社 | Dc feeding system |
| US10326305B1 (en) * | 2018-08-27 | 2019-06-18 | Ekergy Llc | Personal power plant system and methods of inverse energy generation |
| US10615610B1 (en) | 2019-05-28 | 2020-04-07 | Ekergy Llc | System and method for efficient charging of multiple battery cassettes |
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| CN102208815A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Household multi-energy system and control method thereof |
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| US20130154369A1 (en) | 2013-06-20 |
| KR101369633B1 (en) | 2014-03-04 |
| CN103166325A (en) | 2013-06-19 |
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